diff --git a/index.html b/index.html
index b8d679f51..a5a014929 100644
--- a/index.html
+++ b/index.html
@@ -722,7 +722,7 @@ on supported browsers please check <a href="http://www.webrtc.org/">http://www.w
     <script src="lib/angular-route/angular-route.min.js"></script>
     <script src="lib/angular-foundation/mm-foundation.min.js"></script>
     <script src="lib/angular-foundation/mm-foundation-tpls.min.js"></script>
-    <script src="lib/peerjs/peer.js"></script>
+    <script src="lib/peer.js"></script> <!-- TODO Change this on new PeerJS version -->
     <script src="lib/bitcore/browser/bundle.js"></script>
     <script src="lib/crypto-js/rollups/sha256.js"></script>
     <script src="lib/crypto-js/rollups/pbkdf2.js"></script>
diff --git a/js/models/core/Wallet.js b/js/models/core/Wallet.js
index 9c48ca4fd..e584d19b5 100644
--- a/js/models/core/Wallet.js
+++ b/js/models/core/Wallet.js
@@ -32,6 +32,12 @@ function Wallet(opts) {
   this.name = opts.name;
   this.netKey = opts.netKey || SecureRandom.getRandomBuffer(8).toString('base64');
 
+  // Renew token every 24hs
+  if (opts.tokenTime && new Date().getTime() - opts.tokenTime < 86400000) {
+    this.token = opts.token;
+    this.tokenTime = opts.tokenTime;
+  }
+
   this.verbose = opts.verbose;
   this.publicKeyRing.walletId = this.id;
   this.txProposals.walletId = this.id;
@@ -162,6 +168,8 @@ Wallet.prototype._optsToObj = function() {
     requiredCopayers: this.requiredCopayers,
     totalCopayers: this.totalCopayers,
     name: this.name,
+    token: this.token,
+    tokenTime: new Date().getTime(),
     netKey: this.netKey,
     version: this.version,
   };
@@ -221,6 +229,7 @@ Wallet.prototype.netStart = function() {
   var myId = self.getMyCopayerId();
   var startOpts = {
     copayerId: myId,
+    token: self.token,
     maxPeers: self.totalCopayers,
     netKey: this.netKey,
   };
@@ -230,6 +239,7 @@ Wallet.prototype.netStart = function() {
   }
   net.start(startOpts, function() {
     self.emit('ready', net.getPeer());
+    self.token = net.peer.options.token;
     setTimeout(function(){
       console.log('[EMIT publicKeyRingUpdated:]'); //TODO
       self.emit('publicKeyRingUpdated', true);
@@ -237,6 +247,7 @@ Wallet.prototype.netStart = function() {
       self.connectToAll();
       console.log('[EMIT TxProposal]'); //TODO
       self.emit('txProposalsUpdated');
+      self.store();
     },10);
   });
 };
@@ -305,6 +316,8 @@ Wallet.fromObj = function(o, storage, network, blockchain) {
 
 Wallet.prototype.toEncryptedObj = function() {
   var walletObj = this.toObj();
+  delete walletObj.opts.token;
+  delete walletObj.opts.tokenTime;
   return this.storage.export(walletObj);
 };
 
diff --git a/js/models/network/WebRTC.js b/js/models/network/WebRTC.js
index 41719dd9e..8d424af2d 100644
--- a/js/models/network/WebRTC.js
+++ b/js/models/network/WebRTC.js
@@ -3,6 +3,7 @@ var imports     = require('soop').imports();
 var EventEmitter= imports.EventEmitter || require('events').EventEmitter;
 var bitcore     = require('bitcore');
 var util        = bitcore.util;
+var extend      = require('util')._extend;
 /*
  * Emits
  *  'connect'
@@ -327,6 +328,9 @@ Network.prototype.start = function(opts, openCallback) {
   this.netKey = opts.netKey;
   this.maxPeers = opts.maxPeers || this.maxPeers;
 
+  if (opts.token)
+    this.opts.token = opts.token;
+
   if (!this.copayerId)
     this.setCopayerId(opts.copayerId);
 
diff --git a/lib/peer.js b/lib/peer.js
new file mode 100644
index 000000000..0289ef5f2
--- /dev/null
+++ b/lib/peer.js
@@ -0,0 +1,2657 @@
+/*! peerjs.js build:0.3.8, development. Copyright(c) 2013 Michelle Bu <michelle@michellebu.com> */
+(function(exports){
+var binaryFeatures = {};
+binaryFeatures.useBlobBuilder = (function(){
+  try {
+    new Blob([]);
+    return false;
+  } catch (e) {
+    return true;
+  }
+})();
+
+binaryFeatures.useArrayBufferView = !binaryFeatures.useBlobBuilder && (function(){
+  try {
+    return (new Blob([new Uint8Array([])])).size === 0;
+  } catch (e) {
+    return true;
+  }
+})();
+
+exports.binaryFeatures = binaryFeatures;
+exports.BlobBuilder = window.WebKitBlobBuilder || window.MozBlobBuilder || window.MSBlobBuilder || window.BlobBuilder;
+
+function BufferBuilder(){
+  this._pieces = [];
+  this._parts = [];
+}
+
+BufferBuilder.prototype.append = function(data) {
+  if(typeof data === 'number') {
+    this._pieces.push(data);
+  } else {
+    this.flush();
+    this._parts.push(data);
+  }
+};
+
+BufferBuilder.prototype.flush = function() {
+  if (this._pieces.length > 0) {
+    var buf = new Uint8Array(this._pieces);
+    if(!binaryFeatures.useArrayBufferView) {
+      buf = buf.buffer;
+    }
+    this._parts.push(buf);
+    this._pieces = [];
+  }
+};
+
+BufferBuilder.prototype.getBuffer = function() {
+  this.flush();
+  if(binaryFeatures.useBlobBuilder) {
+    var builder = new BlobBuilder();
+    for(var i = 0, ii = this._parts.length; i < ii; i++) {
+      builder.append(this._parts[i]);
+    }
+    return builder.getBlob();
+  } else {
+    return new Blob(this._parts);
+  }
+};
+exports.BinaryPack = {
+  unpack: function(data){
+    var unpacker = new Unpacker(data);
+    return unpacker.unpack();
+  },
+  pack: function(data){
+    var packer = new Packer();
+    packer.pack(data);
+    var buffer = packer.getBuffer();
+    return buffer;
+  }
+};
+
+function Unpacker (data){
+  // Data is ArrayBuffer
+  this.index = 0;
+  this.dataBuffer = data;
+  this.dataView = new Uint8Array(this.dataBuffer);
+  this.length = this.dataBuffer.byteLength;
+}
+
+
+Unpacker.prototype.unpack = function(){
+  var type = this.unpack_uint8();
+  if (type < 0x80){
+    var positive_fixnum = type;
+    return positive_fixnum;
+  } else if ((type ^ 0xe0) < 0x20){
+    var negative_fixnum = (type ^ 0xe0) - 0x20;
+    return negative_fixnum;
+  }
+  var size;
+  if ((size = type ^ 0xa0) <= 0x0f){
+    return this.unpack_raw(size);
+  } else if ((size = type ^ 0xb0) <= 0x0f){
+    return this.unpack_string(size);
+  } else if ((size = type ^ 0x90) <= 0x0f){
+    return this.unpack_array(size);
+  } else if ((size = type ^ 0x80) <= 0x0f){
+    return this.unpack_map(size);
+  }
+  switch(type){
+    case 0xc0:
+      return null;
+    case 0xc1:
+      return undefined;
+    case 0xc2:
+      return false;
+    case 0xc3:
+      return true;
+    case 0xca:
+      return this.unpack_float();
+    case 0xcb:
+      return this.unpack_double();
+    case 0xcc:
+      return this.unpack_uint8();
+    case 0xcd:
+      return this.unpack_uint16();
+    case 0xce:
+      return this.unpack_uint32();
+    case 0xcf:
+      return this.unpack_uint64();
+    case 0xd0:
+      return this.unpack_int8();
+    case 0xd1:
+      return this.unpack_int16();
+    case 0xd2:
+      return this.unpack_int32();
+    case 0xd3:
+      return this.unpack_int64();
+    case 0xd4:
+      return undefined;
+    case 0xd5:
+      return undefined;
+    case 0xd6:
+      return undefined;
+    case 0xd7:
+      return undefined;
+    case 0xd8:
+      size = this.unpack_uint16();
+      return this.unpack_string(size);
+    case 0xd9:
+      size = this.unpack_uint32();
+      return this.unpack_string(size);
+    case 0xda:
+      size = this.unpack_uint16();
+      return this.unpack_raw(size);
+    case 0xdb:
+      size = this.unpack_uint32();
+      return this.unpack_raw(size);
+    case 0xdc:
+      size = this.unpack_uint16();
+      return this.unpack_array(size);
+    case 0xdd:
+      size = this.unpack_uint32();
+      return this.unpack_array(size);
+    case 0xde:
+      size = this.unpack_uint16();
+      return this.unpack_map(size);
+    case 0xdf:
+      size = this.unpack_uint32();
+      return this.unpack_map(size);
+  }
+}
+
+Unpacker.prototype.unpack_uint8 = function(){
+  var byte = this.dataView[this.index] & 0xff;
+  this.index++;
+  return byte;
+};
+
+Unpacker.prototype.unpack_uint16 = function(){
+  var bytes = this.read(2);
+  var uint16 =
+    ((bytes[0] & 0xff) * 256) + (bytes[1] & 0xff);
+  this.index += 2;
+  return uint16;
+}
+
+Unpacker.prototype.unpack_uint32 = function(){
+  var bytes = this.read(4);
+  var uint32 =
+     ((bytes[0]  * 256 +
+       bytes[1]) * 256 +
+       bytes[2]) * 256 +
+       bytes[3];
+  this.index += 4;
+  return uint32;
+}
+
+Unpacker.prototype.unpack_uint64 = function(){
+  var bytes = this.read(8);
+  var uint64 =
+   ((((((bytes[0]  * 256 +
+       bytes[1]) * 256 +
+       bytes[2]) * 256 +
+       bytes[3]) * 256 +
+       bytes[4]) * 256 +
+       bytes[5]) * 256 +
+       bytes[6]) * 256 +
+       bytes[7];
+  this.index += 8;
+  return uint64;
+}
+
+
+Unpacker.prototype.unpack_int8 = function(){
+  var uint8 = this.unpack_uint8();
+  return (uint8 < 0x80 ) ? uint8 : uint8 - (1 << 8);
+};
+
+Unpacker.prototype.unpack_int16 = function(){
+  var uint16 = this.unpack_uint16();
+  return (uint16 < 0x8000 ) ? uint16 : uint16 - (1 << 16);
+}
+
+Unpacker.prototype.unpack_int32 = function(){
+  var uint32 = this.unpack_uint32();
+  return (uint32 < Math.pow(2, 31) ) ? uint32 :
+    uint32 - Math.pow(2, 32);
+}
+
+Unpacker.prototype.unpack_int64 = function(){
+  var uint64 = this.unpack_uint64();
+  return (uint64 < Math.pow(2, 63) ) ? uint64 :
+    uint64 - Math.pow(2, 64);
+}
+
+Unpacker.prototype.unpack_raw = function(size){
+  if ( this.length < this.index + size){
+    throw new Error('BinaryPackFailure: index is out of range'
+      + ' ' + this.index + ' ' + size + ' ' + this.length);
+  }
+  var buf = this.dataBuffer.slice(this.index, this.index + size);
+  this.index += size;
+
+    //buf = util.bufferToString(buf);
+
+  return buf;
+}
+
+Unpacker.prototype.unpack_string = function(size){
+  var bytes = this.read(size);
+  var i = 0, str = '', c, code;
+  while(i < size){
+    c = bytes[i];
+    if ( c < 128){
+      str += String.fromCharCode(c);
+      i++;
+    } else if ((c ^ 0xc0) < 32){
+      code = ((c ^ 0xc0) << 6) | (bytes[i+1] & 63);
+      str += String.fromCharCode(code);
+      i += 2;
+    } else {
+      code = ((c & 15) << 12) | ((bytes[i+1] & 63) << 6) |
+        (bytes[i+2] & 63);
+      str += String.fromCharCode(code);
+      i += 3;
+    }
+  }
+  this.index += size;
+  return str;
+}
+
+Unpacker.prototype.unpack_array = function(size){
+  var objects = new Array(size);
+  for(var i = 0; i < size ; i++){
+    objects[i] = this.unpack();
+  }
+  return objects;
+}
+
+Unpacker.prototype.unpack_map = function(size){
+  var map = {};
+  for(var i = 0; i < size ; i++){
+    var key  = this.unpack();
+    var value = this.unpack();
+    map[key] = value;
+  }
+  return map;
+}
+
+Unpacker.prototype.unpack_float = function(){
+  var uint32 = this.unpack_uint32();
+  var sign = uint32 >> 31;
+  var exp  = ((uint32 >> 23) & 0xff) - 127;
+  var fraction = ( uint32 & 0x7fffff ) | 0x800000;
+  return (sign == 0 ? 1 : -1) *
+    fraction * Math.pow(2, exp - 23);
+}
+
+Unpacker.prototype.unpack_double = function(){
+  var h32 = this.unpack_uint32();
+  var l32 = this.unpack_uint32();
+  var sign = h32 >> 31;
+  var exp  = ((h32 >> 20) & 0x7ff) - 1023;
+  var hfrac = ( h32 & 0xfffff ) | 0x100000;
+  var frac = hfrac * Math.pow(2, exp - 20) +
+    l32   * Math.pow(2, exp - 52);
+  return (sign == 0 ? 1 : -1) * frac;
+}
+
+Unpacker.prototype.read = function(length){
+  var j = this.index;
+  if (j + length <= this.length) {
+    return this.dataView.subarray(j, j + length);
+  } else {
+    throw new Error('BinaryPackFailure: read index out of range');
+  }
+}
+
+function Packer(){
+  this.bufferBuilder = new BufferBuilder();
+}
+
+Packer.prototype.getBuffer = function(){
+  return this.bufferBuilder.getBuffer();
+}
+
+Packer.prototype.pack = function(value){
+  var type = typeof(value);
+  if (type == 'string'){
+    this.pack_string(value);
+  } else if (type == 'number'){
+    if (Math.floor(value) === value){
+      this.pack_integer(value);
+    } else{
+      this.pack_double(value);
+    }
+  } else if (type == 'boolean'){
+    if (value === true){
+      this.bufferBuilder.append(0xc3);
+    } else if (value === false){
+      this.bufferBuilder.append(0xc2);
+    }
+  } else if (type == 'undefined'){
+    this.bufferBuilder.append(0xc0);
+  } else if (type == 'object'){
+    if (value === null){
+      this.bufferBuilder.append(0xc0);
+    } else {
+      var constructor = value.constructor;
+      if (constructor == Array){
+        this.pack_array(value);
+      } else if (constructor == Blob || constructor == File) {
+        this.pack_bin(value);
+      } else if (constructor == ArrayBuffer) {
+        if(binaryFeatures.useArrayBufferView) {
+          this.pack_bin(new Uint8Array(value));
+        } else {
+          this.pack_bin(value);
+        }
+      } else if ('BYTES_PER_ELEMENT' in value){
+        if(binaryFeatures.useArrayBufferView) {
+          this.pack_bin(new Uint8Array(value.buffer));
+        } else {
+          this.pack_bin(value.buffer);
+        }
+      } else if (constructor == Object){
+        this.pack_object(value);
+      } else if (constructor == Date){
+        this.pack_string(value.toString());
+      } else if (typeof value.toBinaryPack == 'function'){
+        this.bufferBuilder.append(value.toBinaryPack());
+      } else {
+        throw new Error('Type "' + constructor.toString() + '" not yet supported');
+      }
+    }
+  } else {
+    throw new Error('Type "' + type + '" not yet supported');
+  }
+  this.bufferBuilder.flush();
+}
+
+
+Packer.prototype.pack_bin = function(blob){
+  var length = blob.length || blob.byteLength || blob.size;
+  if (length <= 0x0f){
+    this.pack_uint8(0xa0 + length);
+  } else if (length <= 0xffff){
+    this.bufferBuilder.append(0xda) ;
+    this.pack_uint16(length);
+  } else if (length <= 0xffffffff){
+    this.bufferBuilder.append(0xdb);
+    this.pack_uint32(length);
+  } else{
+    throw new Error('Invalid length');
+    return;
+  }
+  this.bufferBuilder.append(blob);
+}
+
+Packer.prototype.pack_string = function(str){
+  var length = utf8Length(str);
+
+  if (length <= 0x0f){
+    this.pack_uint8(0xb0 + length);
+  } else if (length <= 0xffff){
+    this.bufferBuilder.append(0xd8) ;
+    this.pack_uint16(length);
+  } else if (length <= 0xffffffff){
+    this.bufferBuilder.append(0xd9);
+    this.pack_uint32(length);
+  } else{
+    throw new Error('Invalid length');
+    return;
+  }
+  this.bufferBuilder.append(str);
+}
+
+Packer.prototype.pack_array = function(ary){
+  var length = ary.length;
+  if (length <= 0x0f){
+    this.pack_uint8(0x90 + length);
+  } else if (length <= 0xffff){
+    this.bufferBuilder.append(0xdc)
+    this.pack_uint16(length);
+  } else if (length <= 0xffffffff){
+    this.bufferBuilder.append(0xdd);
+    this.pack_uint32(length);
+  } else{
+    throw new Error('Invalid length');
+  }
+  for(var i = 0; i < length ; i++){
+    this.pack(ary[i]);
+  }
+}
+
+Packer.prototype.pack_integer = function(num){
+  if ( -0x20 <= num && num <= 0x7f){
+    this.bufferBuilder.append(num & 0xff);
+  } else if (0x00 <= num && num <= 0xff){
+    this.bufferBuilder.append(0xcc);
+    this.pack_uint8(num);
+  } else if (-0x80 <= num && num <= 0x7f){
+    this.bufferBuilder.append(0xd0);
+    this.pack_int8(num);
+  } else if ( 0x0000 <= num && num <= 0xffff){
+    this.bufferBuilder.append(0xcd);
+    this.pack_uint16(num);
+  } else if (-0x8000 <= num && num <= 0x7fff){
+    this.bufferBuilder.append(0xd1);
+    this.pack_int16(num);
+  } else if ( 0x00000000 <= num && num <= 0xffffffff){
+    this.bufferBuilder.append(0xce);
+    this.pack_uint32(num);
+  } else if (-0x80000000 <= num && num <= 0x7fffffff){
+    this.bufferBuilder.append(0xd2);
+    this.pack_int32(num);
+  } else if (-0x8000000000000000 <= num && num <= 0x7FFFFFFFFFFFFFFF){
+    this.bufferBuilder.append(0xd3);
+    this.pack_int64(num);
+  } else if (0x0000000000000000 <= num && num <= 0xFFFFFFFFFFFFFFFF){
+    this.bufferBuilder.append(0xcf);
+    this.pack_uint64(num);
+  } else{
+    throw new Error('Invalid integer');
+  }
+}
+
+Packer.prototype.pack_double = function(num){
+  var sign = 0;
+  if (num < 0){
+    sign = 1;
+    num = -num;
+  }
+  var exp  = Math.floor(Math.log(num) / Math.LN2);
+  var frac0 = num / Math.pow(2, exp) - 1;
+  var frac1 = Math.floor(frac0 * Math.pow(2, 52));
+  var b32   = Math.pow(2, 32);
+  var h32 = (sign << 31) | ((exp+1023) << 20) |
+      (frac1 / b32) & 0x0fffff;
+  var l32 = frac1 % b32;
+  this.bufferBuilder.append(0xcb);
+  this.pack_int32(h32);
+  this.pack_int32(l32);
+}
+
+Packer.prototype.pack_object = function(obj){
+  var keys = Object.keys(obj);
+  var length = keys.length;
+  if (length <= 0x0f){
+    this.pack_uint8(0x80 + length);
+  } else if (length <= 0xffff){
+    this.bufferBuilder.append(0xde);
+    this.pack_uint16(length);
+  } else if (length <= 0xffffffff){
+    this.bufferBuilder.append(0xdf);
+    this.pack_uint32(length);
+  } else{
+    throw new Error('Invalid length');
+  }
+  for(var prop in obj){
+    if (obj.hasOwnProperty(prop)){
+      this.pack(prop);
+      this.pack(obj[prop]);
+    }
+  }
+}
+
+Packer.prototype.pack_uint8 = function(num){
+  this.bufferBuilder.append(num);
+}
+
+Packer.prototype.pack_uint16 = function(num){
+  this.bufferBuilder.append(num >> 8);
+  this.bufferBuilder.append(num & 0xff);
+}
+
+Packer.prototype.pack_uint32 = function(num){
+  var n = num & 0xffffffff;
+  this.bufferBuilder.append((n & 0xff000000) >>> 24);
+  this.bufferBuilder.append((n & 0x00ff0000) >>> 16);
+  this.bufferBuilder.append((n & 0x0000ff00) >>>  8);
+  this.bufferBuilder.append((n & 0x000000ff));
+}
+
+Packer.prototype.pack_uint64 = function(num){
+  var high = num / Math.pow(2, 32);
+  var low  = num % Math.pow(2, 32);
+  this.bufferBuilder.append((high & 0xff000000) >>> 24);
+  this.bufferBuilder.append((high & 0x00ff0000) >>> 16);
+  this.bufferBuilder.append((high & 0x0000ff00) >>>  8);
+  this.bufferBuilder.append((high & 0x000000ff));
+  this.bufferBuilder.append((low  & 0xff000000) >>> 24);
+  this.bufferBuilder.append((low  & 0x00ff0000) >>> 16);
+  this.bufferBuilder.append((low  & 0x0000ff00) >>>  8);
+  this.bufferBuilder.append((low  & 0x000000ff));
+}
+
+Packer.prototype.pack_int8 = function(num){
+  this.bufferBuilder.append(num & 0xff);
+}
+
+Packer.prototype.pack_int16 = function(num){
+  this.bufferBuilder.append((num & 0xff00) >> 8);
+  this.bufferBuilder.append(num & 0xff);
+}
+
+Packer.prototype.pack_int32 = function(num){
+  this.bufferBuilder.append((num >>> 24) & 0xff);
+  this.bufferBuilder.append((num & 0x00ff0000) >>> 16);
+  this.bufferBuilder.append((num & 0x0000ff00) >>> 8);
+  this.bufferBuilder.append((num & 0x000000ff));
+}
+
+Packer.prototype.pack_int64 = function(num){
+  var high = Math.floor(num / Math.pow(2, 32));
+  var low  = num % Math.pow(2, 32);
+  this.bufferBuilder.append((high & 0xff000000) >>> 24);
+  this.bufferBuilder.append((high & 0x00ff0000) >>> 16);
+  this.bufferBuilder.append((high & 0x0000ff00) >>>  8);
+  this.bufferBuilder.append((high & 0x000000ff));
+  this.bufferBuilder.append((low  & 0xff000000) >>> 24);
+  this.bufferBuilder.append((low  & 0x00ff0000) >>> 16);
+  this.bufferBuilder.append((low  & 0x0000ff00) >>>  8);
+  this.bufferBuilder.append((low  & 0x000000ff));
+}
+
+function _utf8Replace(m){
+  var code = m.charCodeAt(0);
+
+  if(code <= 0x7ff) return '00';
+  if(code <= 0xffff) return '000';
+  if(code <= 0x1fffff) return '0000';
+  if(code <= 0x3ffffff) return '00000';
+  return '000000';
+}
+
+function utf8Length(str){
+  if (str.length > 600) {
+    // Blob method faster for large strings
+    return (new Blob([str])).size;
+  } else {
+    return str.replace(/[^\u0000-\u007F]/g, _utf8Replace).length;
+  }
+}
+/**
+ * Light EventEmitter. Ported from Node.js/events.js
+ * Eric Zhang
+ */
+
+/**
+ * EventEmitter class
+ * Creates an object with event registering and firing methods
+ */
+function EventEmitter() {
+  // Initialise required storage variables
+  this._events = {};
+}
+
+var isArray = Array.isArray;
+
+
+EventEmitter.prototype.addListener = function(type, listener, scope, once) {
+  if ('function' !== typeof listener) {
+    throw new Error('addListener only takes instances of Function');
+  }
+  
+  // To avoid recursion in the case that type == "newListeners"! Before
+  // adding it to the listeners, first emit "newListeners".
+  this.emit('newListener', type, typeof listener.listener === 'function' ?
+            listener.listener : listener);
+            
+  if (!this._events[type]) {
+    // Optimize the case of one listener. Don't need the extra array object.
+    this._events[type] = listener;
+  } else if (isArray(this._events[type])) {
+
+    // If we've already got an array, just append.
+    this._events[type].push(listener);
+
+  } else {
+    // Adding the second element, need to change to array.
+    this._events[type] = [this._events[type], listener];
+  }
+  return this;
+};
+
+EventEmitter.prototype.on = EventEmitter.prototype.addListener;
+
+EventEmitter.prototype.once = function(type, listener, scope) {
+  if ('function' !== typeof listener) {
+    throw new Error('.once only takes instances of Function');
+  }
+
+  var self = this;
+  function g() {
+    self.removeListener(type, g);
+    listener.apply(this, arguments);
+  };
+
+  g.listener = listener;
+  self.on(type, g);
+
+  return this;
+};
+
+EventEmitter.prototype.removeListener = function(type, listener, scope) {
+  if ('function' !== typeof listener) {
+    throw new Error('removeListener only takes instances of Function');
+  }
+
+  // does not use listeners(), so no side effect of creating _events[type]
+  if (!this._events[type]) return this;
+
+  var list = this._events[type];
+
+  if (isArray(list)) {
+    var position = -1;
+    for (var i = 0, length = list.length; i < length; i++) {
+      if (list[i] === listener ||
+          (list[i].listener && list[i].listener === listener))
+      {
+        position = i;
+        break;
+      }
+    }
+
+    if (position < 0) return this;
+    list.splice(position, 1);
+    if (list.length == 0)
+      delete this._events[type];
+  } else if (list === listener ||
+             (list.listener && list.listener === listener))
+  {
+    delete this._events[type];
+  }
+
+  return this;
+};
+
+
+EventEmitter.prototype.off = EventEmitter.prototype.removeListener;
+
+
+EventEmitter.prototype.removeAllListeners = function(type) {
+  if (arguments.length === 0) {
+    this._events = {};
+    return this;
+  }
+
+  // does not use listeners(), so no side effect of creating _events[type]
+  if (type && this._events && this._events[type]) this._events[type] = null;
+  return this;
+};
+
+EventEmitter.prototype.listeners = function(type) {
+  if (!this._events[type]) this._events[type] = [];
+  if (!isArray(this._events[type])) {
+    this._events[type] = [this._events[type]];
+  }
+  return this._events[type];
+};
+
+EventEmitter.prototype.emit = function(type) {
+  var type = arguments[0];
+  var handler = this._events[type];
+  if (!handler) return false;
+
+  if (typeof handler == 'function') {
+    switch (arguments.length) {
+      // fast cases
+      case 1:
+        handler.call(this);
+        break;
+      case 2:
+        handler.call(this, arguments[1]);
+        break;
+      case 3:
+        handler.call(this, arguments[1], arguments[2]);
+        break;
+      // slower
+      default:
+        var l = arguments.length;
+        var args = new Array(l - 1);
+        for (var i = 1; i < l; i++) args[i - 1] = arguments[i];
+        handler.apply(this, args);
+    }
+    return true;
+
+  } else if (isArray(handler)) {
+    var l = arguments.length;
+    var args = new Array(l - 1);
+    for (var i = 1; i < l; i++) args[i - 1] = arguments[i];
+
+    var listeners = handler.slice();
+    for (var i = 0, l = listeners.length; i < l; i++) {
+      listeners[i].apply(this, args);
+    }
+    return true;
+  } else {
+    return false;
+  }
+};
+
+
+
+/**
+ * Reliable transfer for Chrome Canary DataChannel impl.
+ * Author: @michellebu
+ */
+function Reliable(dc, debug) {
+  if (!(this instanceof Reliable)) return new Reliable(dc);
+  this._dc = dc;
+
+  util.debug = debug;
+
+  // Messages sent/received so far.
+  // id: { ack: n, chunks: [...] }
+  this._outgoing = {};
+  // id: { ack: ['ack', id, n], chunks: [...] }
+  this._incoming = {};
+  this._received = {};
+
+  // Window size.
+  this._window = 1000;
+  // MTU.
+  this._mtu = 500;
+  // Interval for setInterval. In ms.
+  this._interval = 0;
+
+  // Messages sent.
+  this._count = 0;
+
+  // Outgoing message queue.
+  this._queue = [];
+
+  this._setupDC();
+};
+
+// Send a message reliably.
+Reliable.prototype.send = function(msg) {
+  // Determine if chunking is necessary.
+  var bl = util.pack(msg);
+  if (bl.size < this._mtu) {
+    this._handleSend(['no', bl]);
+    return;
+  }
+
+  this._outgoing[this._count] = {
+    ack: 0,
+    chunks: this._chunk(bl)
+  };
+
+  if (util.debug) {
+    this._outgoing[this._count].timer = new Date();
+  }
+
+  // Send prelim window.
+  this._sendWindowedChunks(this._count);
+  this._count += 1;
+};
+
+// Set up interval for processing queue.
+Reliable.prototype._setupInterval = function() {
+  // TODO: fail gracefully.
+
+  var self = this;
+  this._timeout = setInterval(function() {
+    // FIXME: String stuff makes things terribly async.
+    var msg = self._queue.shift();
+    if (msg._multiple) {
+      for (var i = 0, ii = msg.length; i < ii; i += 1) {
+        self._intervalSend(msg[i]);
+      }
+    } else {
+      self._intervalSend(msg);
+    }
+  }, this._interval);
+};
+
+Reliable.prototype._intervalSend = function(msg) {
+  var self = this;
+  msg = util.pack(msg);
+  util.blobToBinaryString(msg, function(str) {
+    self._dc.send(str);
+  });
+  if (self._queue.length === 0) {
+    clearTimeout(self._timeout);
+    self._timeout = null;
+    //self._processAcks();
+  }
+};
+
+// Go through ACKs to send missing pieces.
+Reliable.prototype._processAcks = function() {
+  for (var id in this._outgoing) {
+    if (this._outgoing.hasOwnProperty(id)) {
+      this._sendWindowedChunks(id);
+    }
+  }
+};
+
+// Handle sending a message.
+// FIXME: Don't wait for interval time for all messages...
+Reliable.prototype._handleSend = function(msg) {
+  var push = true;
+  for (var i = 0, ii = this._queue.length; i < ii; i += 1) {
+    var item = this._queue[i];
+    if (item === msg) {
+      push = false;
+    } else if (item._multiple && item.indexOf(msg) !== -1) {
+      push = false;
+    }
+  }
+  if (push) {
+    this._queue.push(msg);
+    if (!this._timeout) {
+      this._setupInterval();
+    }
+  }
+};
+
+// Set up DataChannel handlers.
+Reliable.prototype._setupDC = function() {
+  // Handle various message types.
+  var self = this;
+  this._dc.onmessage = function(e) {
+    var msg = e.data;
+    var datatype = msg.constructor;
+    // FIXME: msg is String until binary is supported.
+    // Once that happens, this will have to be smarter.
+    if (datatype === String) {
+      var ab = util.binaryStringToArrayBuffer(msg);
+      msg = util.unpack(ab);
+      self._handleMessage(msg);
+    }
+  };
+};
+
+// Handles an incoming message.
+Reliable.prototype._handleMessage = function(msg) {
+  var id = msg[1];
+  var idata = this._incoming[id];
+  var odata = this._outgoing[id];
+  var data;
+  switch (msg[0]) {
+    // No chunking was done.
+    case 'no':
+      var message = id;
+      if (!!message) {
+        this.onmessage(util.unpack(message));
+      }
+      break;
+    // Reached the end of the message.
+    case 'end':
+      data = idata;
+
+      // In case end comes first.
+      this._received[id] = msg[2];
+
+      if (!data) {
+        break;
+      }
+
+      this._ack(id);
+      break;
+    case 'ack':
+      data = odata;
+      if (!!data) {
+        var ack = msg[2];
+        // Take the larger ACK, for out of order messages.
+        data.ack = Math.max(ack, data.ack);
+
+        // Clean up when all chunks are ACKed.
+        if (data.ack >= data.chunks.length) {
+          util.log('Time: ', new Date() - data.timer);
+          delete this._outgoing[id];
+        } else {
+          this._processAcks();
+        }
+      }
+      // If !data, just ignore.
+      break;
+    // Received a chunk of data.
+    case 'chunk':
+      // Create a new entry if none exists.
+      data = idata;
+      if (!data) {
+        var end = this._received[id];
+        if (end === true) {
+          break;
+        }
+        data = {
+          ack: ['ack', id, 0],
+          chunks: []
+        };
+        this._incoming[id] = data;
+      }
+
+      var n = msg[2];
+      var chunk = msg[3];
+      data.chunks[n] = new Uint8Array(chunk);
+
+      // If we get the chunk we're looking for, ACK for next missing.
+      // Otherwise, ACK the same N again.
+      if (n === data.ack[2]) {
+        this._calculateNextAck(id);
+      }
+      this._ack(id);
+      break;
+    default:
+      // Shouldn't happen, but would make sense for message to just go
+      // through as is.
+      this._handleSend(msg);
+      break;
+  }
+};
+
+// Chunks BL into smaller messages.
+Reliable.prototype._chunk = function(bl) {
+  var chunks = [];
+  var size = bl.size;
+  var start = 0;
+  while (start < size) {
+    var end = Math.min(size, start + this._mtu);
+    var b = bl.slice(start, end);
+    var chunk = {
+      payload: b
+    }
+    chunks.push(chunk);
+    start = end;
+  }
+  util.log('Created', chunks.length, 'chunks.');
+  return chunks;
+};
+
+// Sends ACK N, expecting Nth blob chunk for message ID.
+Reliable.prototype._ack = function(id) {
+  var ack = this._incoming[id].ack;
+
+  // if ack is the end value, then call _complete.
+  if (this._received[id] === ack[2]) {
+    this._complete(id);
+    this._received[id] = true;
+  }
+
+  this._handleSend(ack);
+};
+
+// Calculates the next ACK number, given chunks.
+Reliable.prototype._calculateNextAck = function(id) {
+  var data = this._incoming[id];
+  var chunks = data.chunks;
+  for (var i = 0, ii = chunks.length; i < ii; i += 1) {
+    // This chunk is missing!!! Better ACK for it.
+    if (chunks[i] === undefined) {
+      data.ack[2] = i;
+      return;
+    }
+  }
+  data.ack[2] = chunks.length;
+};
+
+// Sends the next window of chunks.
+Reliable.prototype._sendWindowedChunks = function(id) {
+  util.log('sendWindowedChunks for: ', id);
+  var data = this._outgoing[id];
+  var ch = data.chunks;
+  var chunks = [];
+  var limit = Math.min(data.ack + this._window, ch.length);
+  for (var i = data.ack; i < limit; i += 1) {
+    if (!ch[i].sent || i === data.ack) {
+      ch[i].sent = true;
+      chunks.push(['chunk', id, i, ch[i].payload]);
+    }
+  }
+  if (data.ack + this._window >= ch.length) {
+    chunks.push(['end', id, ch.length])
+  }
+  chunks._multiple = true;
+  this._handleSend(chunks);
+};
+
+// Puts together a message from chunks.
+Reliable.prototype._complete = function(id) {
+  util.log('Completed called for', id);
+  var self = this;
+  var chunks = this._incoming[id].chunks;
+  var bl = new Blob(chunks);
+  util.blobToArrayBuffer(bl, function(ab) {
+    self.onmessage(util.unpack(ab));
+  });
+  delete this._incoming[id];
+};
+
+// Ups bandwidth limit on SDP. Meant to be called during offer/answer.
+Reliable.higherBandwidthSDP = function(sdp) {
+  // AS stands for Application-Specific Maximum.
+  // Bandwidth number is in kilobits / sec.
+  // See RFC for more info: http://www.ietf.org/rfc/rfc2327.txt
+
+  // Chrome 31+ doesn't want us munging the SDP, so we'll let them have their
+  // way.
+  var version = navigator.appVersion.match(/Chrome\/(.*?) /);
+  if (version) {
+    version = parseInt(version[1].split('.').shift());
+    if (version < 31) {
+      var parts = sdp.split('b=AS:30');
+      var replace = 'b=AS:102400'; // 100 Mbps
+      if (parts.length > 1) {
+        return parts[0] + replace + parts[1];
+      }
+    }
+  }
+
+  return sdp;
+};
+
+// Overwritten, typically.
+Reliable.prototype.onmessage = function(msg) {};
+
+exports.Reliable = Reliable;
+exports.RTCSessionDescription = window.RTCSessionDescription || window.mozRTCSessionDescription;
+exports.RTCPeerConnection = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection;
+exports.RTCIceCandidate = window.RTCIceCandidate || window.mozRTCIceCandidate;
+var defaultConfig = {'iceServers': [{ 'url': 'stun:stun.l.google.com:19302' }]};
+var dataCount = 1;
+
+var util = {
+  noop: function() {},
+
+  CLOUD_HOST: '0.peerjs.com',
+  CLOUD_PORT: 9000,
+
+  // Browsers that need chunking:
+  chunkedBrowsers: {'Chrome': 1},
+  chunkedMTU: 16300, // The original 60000 bytes setting does not work when sending data from Firefox to Chrome, which is "cut off" after 16384 bytes and delivered individually.
+
+  // Logging logic
+  logLevel: 0,
+  setLogLevel: function(level) {
+    var debugLevel = parseInt(level, 10);
+    if (!isNaN(parseInt(level, 10))) {
+      util.logLevel = debugLevel;
+    } else {
+      // If they are using truthy/falsy values for debug
+      util.logLevel = level ? 3 : 0;
+    }
+    util.log = util.warn = util.error = util.noop;
+    if (util.logLevel > 0) {
+      util.error = util._printWith('ERROR');
+    }
+    if (util.logLevel > 1) {
+      util.warn = util._printWith('WARNING');
+    }
+    if (util.logLevel > 2) {
+      util.log = util._print;
+    }
+  },
+  setLogFunction: function(fn) {
+    if (fn.constructor !== Function) {
+      util.warn('The log function you passed in is not a function. Defaulting to regular logs.');
+    } else {
+      util._print = fn;
+    }
+  },
+
+  _printWith: function(prefix) {
+    return function() {
+      var copy = Array.prototype.slice.call(arguments);
+      copy.unshift(prefix);
+      util._print.apply(util, copy);
+    };
+  },
+  _print: function () {
+    var err = false;
+    var copy = Array.prototype.slice.call(arguments);
+    copy.unshift('PeerJS: ');
+    for (var i = 0, l = copy.length; i < l; i++){
+      if (copy[i] instanceof Error) {
+        copy[i] = '(' + copy[i].name + ') ' + copy[i].message;
+        err = true;
+      }
+    }
+    err ? console.error.apply(console, copy) : console.log.apply(console, copy);  
+  },
+  //
+
+  // Returns browser-agnostic default config
+  defaultConfig: defaultConfig,
+  //
+
+  // Returns the current browser.
+  browser: (function() {
+    if (window.mozRTCPeerConnection) {
+      return 'Firefox';
+    } else if (window.webkitRTCPeerConnection) {
+      return 'Chrome';
+    } else if (window.RTCPeerConnection) {
+      return 'Supported';
+    } else {
+      return 'Unsupported';
+    }
+  })(),
+  //
+
+  // Lists which features are supported
+  supports: (function() {
+    if (typeof RTCPeerConnection === 'undefined') {
+      return {};
+    }
+
+    var data = true;
+    var audioVideo = true;
+
+    var binaryBlob = false;
+    var sctp = false;
+    var onnegotiationneeded = !!window.webkitRTCPeerConnection;
+
+    var pc, dc;
+    try {
+      pc = new RTCPeerConnection(defaultConfig, {optional: [{RtpDataChannels: true}]});
+    } catch (e) {
+      data = false;
+      audioVideo = false;
+    }
+
+    if (data) {
+      try {
+        dc = pc.createDataChannel('_PEERJSTEST');
+      } catch (e) {
+        data = false;
+      }
+    }
+
+    if (data) {
+      // Binary test
+      try {
+        dc.binaryType = 'blob';
+        binaryBlob = true;
+      } catch (e) {
+      }
+
+      // Reliable test.
+      // Unfortunately Chrome is a bit unreliable about whether or not they
+      // support reliable.
+      var reliablePC = new RTCPeerConnection(defaultConfig, {});
+      try {
+        var reliableDC = reliablePC.createDataChannel('_PEERJSRELIABLETEST', {});
+        sctp = reliableDC.reliable;
+      } catch (e) {
+      }
+      reliablePC.close();
+    }
+
+    // FIXME: not really the best check...
+    if (audioVideo) {
+      audioVideo = !!pc.addStream;
+    }
+
+    // FIXME: this is not great because in theory it doesn't work for
+    // av-only browsers (?).
+    if (!onnegotiationneeded && data) {
+      // sync default check.
+      var negotiationPC = new RTCPeerConnection(defaultConfig, {optional: [{RtpDataChannels: true}]});
+      negotiationPC.onnegotiationneeded = function() {
+        onnegotiationneeded = true;
+        // async check.
+        if (util && util.supports) {
+          util.supports.onnegotiationneeded = true;
+        }
+      };
+      var negotiationDC = negotiationPC.createDataChannel('_PEERJSNEGOTIATIONTEST');
+
+      setTimeout(function() {
+        negotiationPC.close();
+      }, 1000);
+    }
+
+    if (pc) {
+      pc.close();
+    }
+
+    return {
+      audioVideo: audioVideo,
+      data: data,
+      binaryBlob: binaryBlob,
+      binary: sctp, // deprecated; sctp implies binary support.
+      reliable: sctp, // deprecated; sctp implies reliable data.
+      sctp: sctp,
+      onnegotiationneeded: onnegotiationneeded
+    };
+  }()),
+  //
+
+  // Ensure alphanumeric ids
+  validateId: function(id) {
+    // Allow empty ids
+    return !id || /^[A-Za-z0-9]+(?:[ _-][A-Za-z0-9]+)*$/.exec(id);
+  },
+
+  validateKey: function(key) {
+    // Allow empty keys
+    return !key || /^[A-Za-z0-9]+(?:[ _-][A-Za-z0-9]+)*$/.exec(key);
+  },
+
+
+  debug: false,
+
+  inherits: function(ctor, superCtor) {
+    ctor.super_ = superCtor;
+    ctor.prototype = Object.create(superCtor.prototype, {
+      constructor: {
+        value: ctor,
+        enumerable: false,
+        writable: true,
+        configurable: true
+      }
+    });
+  },
+  extend: function(dest, source) {
+    for(var key in source) {
+      if(source.hasOwnProperty(key)) {
+        dest[key] = source[key];
+      }
+    }
+    return dest;
+  },
+  pack: BinaryPack.pack,
+  unpack: BinaryPack.unpack,
+
+  log: function () {
+    if (util.debug) {
+      var err = false;
+      var copy = Array.prototype.slice.call(arguments);
+      copy.unshift('PeerJS: ');
+      for (var i = 0, l = copy.length; i < l; i++){
+        if (copy[i] instanceof Error) {
+          copy[i] = '(' + copy[i].name + ') ' + copy[i].message;
+          err = true;
+        }
+      }
+      err ? console.error.apply(console, copy) : console.log.apply(console, copy);
+    }
+  },
+
+  setZeroTimeout: (function(global) {
+    var timeouts = [];
+    var messageName = 'zero-timeout-message';
+
+    // Like setTimeout, but only takes a function argument.	 There's
+    // no time argument (always zero) and no arguments (you have to
+    // use a closure).
+    function setZeroTimeoutPostMessage(fn) {
+      timeouts.push(fn);
+      global.postMessage(messageName, '*');
+    }
+
+    function handleMessage(event) {
+      if (event.source == global && event.data == messageName) {
+        if (event.stopPropagation) {
+          event.stopPropagation();
+        }
+        if (timeouts.length) {
+          timeouts.shift()();
+        }
+      }
+    }
+    if (global.addEventListener) {
+      global.addEventListener('message', handleMessage, true);
+    } else if (global.attachEvent) {
+      global.attachEvent('onmessage', handleMessage);
+    }
+    return setZeroTimeoutPostMessage;
+  }(this)),
+
+  // Binary stuff
+
+  // chunks a blob.
+  chunk: function(bl) {
+    var chunks = [];
+    var size = bl.size;
+    var start = index = 0;
+    var total = Math.ceil(size / util.chunkedMTU);
+    while (start < size) {
+      var end = Math.min(size, start + util.chunkedMTU);
+      var b = bl.slice(start, end);
+
+      var chunk = {
+        __peerData: dataCount,
+        n: index,
+        data: b,
+        total: total
+      };
+
+      chunks.push(chunk);
+
+      start = end;
+      index += 1;
+    }
+    dataCount += 1;
+    return chunks;
+  },
+
+  blobToArrayBuffer: function(blob, cb){
+    var fr = new FileReader();
+    fr.onload = function(evt) {
+      cb(evt.target.result);
+    };
+    fr.readAsArrayBuffer(blob);
+  },
+  blobToBinaryString: function(blob, cb){
+    var fr = new FileReader();
+    fr.onload = function(evt) {
+      cb(evt.target.result);
+    };
+    fr.readAsBinaryString(blob);
+  },
+  binaryStringToArrayBuffer: function(binary) {
+    var byteArray = new Uint8Array(binary.length);
+    for (var i = 0; i < binary.length; i++) {
+      byteArray[i] = binary.charCodeAt(i) & 0xff;
+    }
+    return byteArray.buffer;
+  },
+  randomToken: function () {
+    return Math.random().toString(36).substr(2);
+  },
+  //
+
+  isSecure: function() {
+    return location.protocol === 'https:';
+  }
+};
+
+exports.util = util;
+/**
+ * A peer who can initiate connections with other peers.
+ */
+function Peer(id, options) {
+  if (!(this instanceof Peer)) return new Peer(id, options);
+  EventEmitter.call(this);
+
+  // Deal with overloading
+  if (id && id.constructor == Object) {
+    options = id;
+    id = undefined;
+  } else if (id) {
+    // Ensure id is a string
+    id = id.toString();
+  }
+  //
+
+  // Configurize options
+  options = util.extend({
+    debug: 0, // 1: Errors, 2: Warnings, 3: All logs
+    host: util.CLOUD_HOST,
+    port: util.CLOUD_PORT,
+    key: 'peerjs',
+    path: '/',
+    token: util.randomToken(),
+    config: util.defaultConfig
+  }, options);
+  this.options = options;
+  // Detect relative URL host.
+  if (options.host === '/') {
+    options.host = window.location.hostname;
+  }
+  // Set path correctly.
+  if (options.path[0] !== '/') {
+    options.path = '/' + options.path;
+  }
+  if (options.path[options.path.length - 1] !== '/') {
+    options.path += '/';
+  }
+
+  // Set whether we use SSL to same as current host
+  if (options.secure === undefined && options.host !== util.CLOUD_HOST) {
+    options.secure = util.isSecure();
+  }
+  // Set a custom log function if present
+  if (options.logFunction) {
+    util.setLogFunction(options.logFunction);
+  }
+  util.setLogLevel(options.debug);
+  //
+
+  // Sanity checks
+  // Ensure WebRTC supported
+  if (!util.supports.audioVideo && !util.supports.data ) {
+    this._delayedAbort('browser-incompatible', 'The current browser does not support WebRTC');
+    return;
+  }
+  // Ensure alphanumeric id
+  if (!util.validateId(id)) {
+    this._delayedAbort('invalid-id', 'ID "' + id + '" is invalid');
+    return;
+  }
+  // Ensure valid key
+  if (!util.validateKey(options.key)) {
+    this._delayedAbort('invalid-key', 'API KEY "' + options.key + '" is invalid');
+    return;
+  }
+  // Ensure not using unsecure cloud server on SSL page
+  if (options.secure && options.host === '0.peerjs.com') {
+    this._delayedAbort('ssl-unavailable',
+      'The cloud server currently does not support HTTPS. Please run your own PeerServer to use HTTPS.');
+    return;
+  }
+  //
+
+  // States.
+  this.destroyed = false; // Connections have been killed
+  this.disconnected = false; // Connection to PeerServer killed manually but P2P connections still active
+  this.open = false; // Sockets and such are not yet open.
+  //
+
+  // References
+  this.connections = {}; // DataConnections for this peer.
+  this._lostMessages = {}; // src => [list of messages]
+  //
+
+  // Initialize the 'socket' (which is actually a mix of XHR streaming and
+  // websockets.)
+  var self = this;
+  this.socket = new Socket(this.options.secure, this.options.host, this.options.port, this.options.path, this.options.key);
+  this.socket.on('message', function(data) {
+    self._handleMessage(data);
+  });
+  this.socket.on('error', function(error) {
+    self._abort('socket-error', error);
+  });
+  this.socket.on('close', function() {
+    if (!self.disconnected) { // If we haven't explicitly disconnected, emit error.
+      self._abort('socket-closed', 'Underlying socket is already closed.');
+    }
+  });
+  //
+
+  // Start the connections
+  if (id) {
+    this._initialize(id);
+  } else {
+    this._retrieveId();
+  }
+  //
+};
+
+util.inherits(Peer, EventEmitter);
+
+/** Get a unique ID from the server via XHR. */
+Peer.prototype._retrieveId = function(cb) {
+  var self = this;
+  var http = new XMLHttpRequest();
+  var protocol = this.options.secure ? 'https://' : 'http://';
+  var url = protocol + this.options.host + ':' + this.options.port
+    + this.options.path + this.options.key + '/id';
+  var queryString = '?ts=' + new Date().getTime() + '' + Math.random();
+  url += queryString;
+
+  // If there's no ID we need to wait for one before trying to init socket.
+  http.open('get', url, true);
+  http.onerror = function(e) {
+    util.error('Error retrieving ID', e);
+    var pathError = '';
+    if (self.options.path === '/' && self.options.host !== util.CLOUD_HOST) {
+      pathError = ' If you passed in a `path` to your self-hosted PeerServer, '
+        + 'you\'ll also need to pass in that same path when creating a new'
+        + ' Peer.';
+    }
+    self._abort('server-error', 'Could not get an ID from the server.' + pathError);
+  }
+  http.onreadystatechange = function() {
+    if (http.readyState !== 4) {
+      return;
+    }
+    if (http.status !== 200) {
+      http.onerror();
+      return;
+    }
+    self._initialize(http.responseText);
+  };
+  http.send(null);
+};
+
+/** Initialize a connection with the server. */
+Peer.prototype._initialize = function(id) {
+  var self = this;
+  this.id = id;
+  this.socket.start(this.id, this.options.token);
+}
+
+/** Handles messages from the server. */
+Peer.prototype._handleMessage = function(message) {
+  var type = message.type;
+  var payload = message.payload;
+  var peer = message.src;
+
+  switch (type) {
+    case 'OPEN': // The connection to the server is open.
+      this.emit('open', this.id);
+      this.open = true;
+      break;
+    case 'ERROR': // Server error.
+      this._abort('server-error', payload.msg);
+      break;
+    case 'ID-TAKEN': // The selected ID is taken.
+      this._abort('unavailable-id', 'ID `' + this.id + '` is taken');
+      break;
+    case 'INVALID-KEY': // The given API key cannot be found.
+      this._abort('invalid-key', 'API KEY "' + this.options.key + '" is invalid');
+      break;
+
+    //
+    case 'LEAVE': // Another peer has closed its connection to this peer.
+      util.log('Received leave message from', peer);
+      this._cleanupPeer(peer);
+      break;
+
+    case 'EXPIRE': // The offer sent to a peer has expired without response.
+      this.emit('error', new Error('Could not connect to peer ' + peer));
+      break;
+    case 'OFFER': // we should consider switching this to CALL/CONNECT, but this is the least breaking option.
+      var connectionId = payload.connectionId;
+      var connection = this.getConnection(peer, connectionId);
+
+      if (connection) {
+        util.warn('Offer received for existing Connection ID:', connectionId);
+        //connection.handleMessage(message);
+      } else {
+        // Create a new connection.
+        if (payload.type === 'media') {
+          var connection = new MediaConnection(peer, this, {
+            connectionId: connectionId,
+            _payload: payload,
+            metadata: payload.metadata
+          });
+          this._addConnection(peer, connection);
+          this.emit('call', connection);
+        } else if (payload.type === 'data') {
+          connection = new DataConnection(peer, this, {
+            connectionId: connectionId,
+            _payload: payload,
+            metadata: payload.metadata,
+            label: payload.label,
+            serialization: payload.serialization,
+            reliable: payload.reliable
+          });
+          this._addConnection(peer, connection);
+          this.emit('connection', connection);
+        } else {
+          util.warn('Received malformed connection type:', payload.type);
+          return;
+        }
+        // Find messages.
+        var messages = this._getMessages(connectionId);
+        for (var i = 0, ii = messages.length; i < ii; i += 1) {
+          connection.handleMessage(messages[i]);
+        }
+      }
+      break;
+    default:
+      if (!payload) {
+        util.warn('You received a malformed message from ' + peer + ' of type ' + type);
+        return;
+      }
+
+      var id = payload.connectionId;
+      var connection = this.getConnection(peer, id);
+
+      if (connection && connection.pc) {
+        // Pass it on.
+        connection.handleMessage(message);
+      } else if (id) {
+        // Store for possible later use
+        this._storeMessage(id, message);
+      } else {
+        util.warn('You received an unrecognized message:', message);
+      }
+      break;
+  }
+}
+
+/** Stores messages without a set up connection, to be claimed later. */
+Peer.prototype._storeMessage = function(connectionId, message) {
+  if (!this._lostMessages[connectionId]) {
+    this._lostMessages[connectionId] = [];
+  }
+  this._lostMessages[connectionId].push(message);
+}
+
+/** Retrieve messages from lost message store */
+Peer.prototype._getMessages = function(connectionId) {
+  var messages = this._lostMessages[connectionId];
+  if (messages) {
+    delete this._lostMessages[connectionId];
+    return messages;
+  } else {
+    return [];
+  }
+}
+
+/**
+ * Returns a DataConnection to the specified peer. See documentation for a
+ * complete list of options.
+ */
+Peer.prototype.connect = function(peer, options) {
+  if (this.disconnected) {
+    util.warn('You cannot connect to a new Peer because you called '
+        + '.disconnect() on this Peer and ended your connection with the'
+        + ' server. You can create a new Peer to reconnect.');
+    this.emit('error', new Error('Cannot connect to new Peer after disconnecting from server.'));
+    return;
+  }
+  var connection = new DataConnection(peer, this, options);
+  this._addConnection(peer, connection);
+  return connection;
+}
+
+/**
+ * Returns a MediaConnection to the specified peer. See documentation for a
+ * complete list of options.
+ */
+Peer.prototype.call = function(peer, stream, options) {
+  if (this.disconnected) {
+    util.warn('You cannot connect to a new Peer because you called '
+        + '.disconnect() on this Peer and ended your connection with the'
+        + ' server. You can create a new Peer to reconnect.');
+    this.emit('error', new Error('Cannot connect to new Peer after disconnecting from server.'));
+    return;
+  }
+  if (!stream) {
+    util.error('To call a peer, you must provide a stream from your browser\'s `getUserMedia`.');
+    return;
+  }
+  options = options || {};
+  options._stream = stream;
+  var call = new MediaConnection(peer, this, options);
+  this._addConnection(peer, call);
+  return call;
+}
+
+/** Add a data/media connection to this peer. */
+Peer.prototype._addConnection = function(peer, connection) {
+  if (!this.connections[peer]) {
+    this.connections[peer] = [];
+  }
+  this.connections[peer].push(connection);
+}
+
+/** Retrieve a data/media connection for this peer. */
+Peer.prototype.getConnection = function(peer, id) {
+  var connections = this.connections[peer];
+  if (!connections) {
+    return null;
+  }
+  for (var i = 0, ii = connections.length; i < ii; i++) {
+    if (connections[i].id === id) {
+      return connections[i];
+    }
+  }
+  return null;
+}
+
+Peer.prototype._delayedAbort = function(type, message) {
+  var self = this;
+  util.setZeroTimeout(function(){
+    self._abort(type, message);
+  });
+}
+
+/** Destroys the Peer and emits an error message. */
+Peer.prototype._abort = function(type, message) {
+  util.error('Aborting. Error:', message);
+  var err = new Error(message);
+  err.type = type;
+  this.destroy();
+  this.emit('error', err);
+};
+
+/**
+ * Destroys the Peer: closes all active connections as well as the connection
+ *  to the server.
+ * Warning: The peer can no longer create or accept connections after being
+ *  destroyed.
+ */
+Peer.prototype.destroy = function() {
+  if (!this.destroyed) {
+    this._cleanup();
+    this.disconnect();
+    this.destroyed = true;
+  }
+}
+
+
+/** Disconnects every connection on this peer. */
+Peer.prototype._cleanup = function() {
+  if (this.connections) {
+    var peers = Object.keys(this.connections);
+    for (var i = 0, ii = peers.length; i < ii; i++) {
+      this._cleanupPeer(peers[i]);
+    }
+  }
+  this.emit('close');
+}
+
+/** Closes all connections to this peer. */
+Peer.prototype._cleanupPeer = function(peer) {
+  var connections = this.connections[peer];
+  for (var j = 0, jj = connections.length; j < jj; j += 1) {
+    connections[j].close();
+  }
+}
+
+/**
+ * Disconnects the Peer's connection to the PeerServer. Does not close any
+ *  active connections.
+ * Warning: The peer can no longer create or accept connections after being
+ *  disconnected. It also cannot reconnect to the server.
+ */
+Peer.prototype.disconnect = function() {
+  var self = this;
+  util.setZeroTimeout(function(){
+    if (!self.disconnected) {
+      self.disconnected = true;
+      self.open = false;
+      if (self.socket) {
+        self.socket.close();
+      }
+      self.id = null;
+    }
+  });
+}
+
+/**
+ * Get a list of available peer IDs. If you're running your own server, you'll
+ * want to set allow_discovery: true in the PeerServer options. If you're using
+ * the cloud server, email team@peerjs.com to get the functionality enabled for
+ * your key.
+ */
+Peer.prototype.listAllPeers = function(cb) {
+  cb = cb || function() {};
+  var self = this;
+  var http = new XMLHttpRequest();
+  var protocol = this.options.secure ? 'https://' : 'http://';
+  var url = protocol + this.options.host + ':' + this.options.port
+    + this.options.path + this.options.key + '/peers';
+  var queryString = '?ts=' + new Date().getTime() + '' + Math.random();
+  url += queryString;
+
+  // If there's no ID we need to wait for one before trying to init socket.
+  http.open('get', url, true);
+  http.onerror = function(e) {
+    self._abort('server-error', 'Could not get peers from the server.');
+    cb([]);
+  }
+  http.onreadystatechange = function() {
+    if (http.readyState !== 4) {
+      return;
+    }
+    if (http.status === 401) {
+      var helpfulError = '';
+      if (self.options.host !== util.CLOUD_HOST) {
+        helpfulError = 'It looks like you\'re using the cloud server. You can email '
+          + 'team@peerjs.com to enable peer listing for your API key.';
+      } else {
+        helpfulError = 'You need to enable `allow_discovery` on your self-hosted'
+          + ' PeerServer to use this feature.';
+      }
+      throw new Error('It doesn\'t look like you have permission to list peers IDs. ' + helpfulError);
+      cb([]);
+    } else if (http.status !== 200) {
+      cb([]);
+    } else {
+      cb(JSON.parse(http.responseText));
+    }
+  };
+  http.send(null);
+}
+
+exports.Peer = Peer;
+/**
+ * Wraps a DataChannel between two Peers.
+ */
+function DataConnection(peer, provider, options) {
+  if (!(this instanceof DataConnection)) return new DataConnection(peer, provider, options);
+  EventEmitter.call(this);
+
+  this.options = util.extend({
+    serialization: 'binary',
+    reliable: false
+  }, options);
+
+  // Connection is not open yet.
+  this.open = false;
+  this.type = 'data';
+  this.peer = peer;
+  this.provider = provider;
+
+  this.id = this.options.connectionId || DataConnection._idPrefix + util.randomToken();
+
+  this.label = this.options.label || this.id;
+  this.metadata = this.options.metadata;
+  this.serialization = this.options.serialization;
+  this.reliable = this.options.reliable;
+
+  // Data channel buffering.
+  this._buffer = [];
+  this._buffering = false;
+  this.bufferSize = 0;
+
+  // For storing large data.
+  this._chunkedData = {};
+
+  if (this.options._payload) {
+    this._peerBrowser = this.options._payload.browser;
+  }
+
+  Negotiator.startConnection(
+    this,
+    this.options._payload || {
+      originator: true
+    }
+  );
+}
+
+util.inherits(DataConnection, EventEmitter);
+
+DataConnection._idPrefix = 'dc_';
+
+/** Called by the Negotiator when the DataChannel is ready. */
+DataConnection.prototype.initialize = function(dc) {
+  this._dc = this.dataChannel = dc;
+  this._configureDataChannel();
+}
+
+DataConnection.prototype._configureDataChannel = function() {
+  var self = this;
+  if (util.supports.sctp) {
+    this._dc.binaryType = 'arraybuffer';
+  }
+  this._dc.onopen = function() {
+    util.log('Data channel connection success');
+    self.open = true;
+    self.emit('open');
+  }
+
+  // Use the Reliable shim for non Firefox browsers
+  if (!util.supports.sctp && this.reliable) {
+    this._reliable = new Reliable(this._dc, util.debug);
+  }
+
+  if (this._reliable) {
+    this._reliable.onmessage = function(msg) {
+      self.emit('data', msg);
+    };
+  } else {
+    this._dc.onmessage = function(e) {
+      self._handleDataMessage(e);
+    };
+  }
+  this._dc.onclose = function(e) {
+    util.log('DataChannel closed for:', self.peer);
+    self.close();
+  };
+}
+
+// Handles a DataChannel message.
+DataConnection.prototype._handleDataMessage = function(e) {
+  var self = this;
+  var data = e.data;
+  var datatype = data.constructor;
+  if (this.serialization === 'binary' || this.serialization === 'binary-utf8') {
+    if (datatype === Blob) {
+      // Datatype should never be blob
+      util.blobToArrayBuffer(data, function(ab) {
+        data = util.unpack(ab);
+        self.emit('data', data);
+      });
+      return;
+    } else if (datatype === ArrayBuffer) {
+      data = util.unpack(data);
+    } else if (datatype === String) {
+      // String fallback for binary data for browsers that don't support binary yet
+      var ab = util.binaryStringToArrayBuffer(data);
+      data = util.unpack(ab);
+    }
+  } else if (this.serialization === 'json') {
+    data = JSON.parse(data);
+  }
+
+  // Check if we've chunked--if so, piece things back together.
+  // We're guaranteed that this isn't 0.
+  if (data.__peerData) {
+    var id = data.__peerData;
+    var chunkInfo = this._chunkedData[id] || {data: [], count: 0, total: data.total};
+
+    chunkInfo.data[data.n] = data.data;
+    chunkInfo.count += 1;
+
+    if (chunkInfo.total === chunkInfo.count) {
+      // We've received all the chunks--time to construct the complete data.
+      data = new Blob(chunkInfo.data);
+      this._handleDataMessage({data: data});
+
+      // We can also just delete the chunks now.
+      delete this._chunkedData[id];
+    }
+
+    this._chunkedData[id] = chunkInfo;
+    return;
+  }
+
+  this.emit('data', data);
+}
+
+/**
+ * Exposed functionality for users.
+ */
+
+/** Allows user to close connection. */
+DataConnection.prototype.close = function() {
+  if (!this.open) {
+    return;
+  }
+  this.open = false;
+  Negotiator.cleanup(this);
+  this.emit('close');
+}
+
+/** Allows user to send data. */
+DataConnection.prototype.send = function(data, chunked) {
+  if (!this.open) {
+    this.emit('error', new Error('Connection is not open. You should listen for the `open` event before sending messages.'));
+    return;
+  }
+  if (this._reliable) {
+    // Note: reliable shim sending will make it so that you cannot customize
+    // serialization.
+    this._reliable.send(data);
+    return;
+  }
+  var self = this;
+  if (this.serialization === 'json') {
+    this._bufferedSend(JSON.stringify(data));
+  } else if (this.serialization === 'binary' || this.serialization === 'binary-utf8') {
+    var blob = util.pack(data);
+
+    // For Chrome-Firefox interoperability, we need to make Firefox "chunk"
+    // the data it sends out.
+    var needsChunking = util.chunkedBrowsers[this._peerBrowser] || util.chunkedBrowsers[util.browser];
+    if (needsChunking && !chunked && blob.size > util.chunkedMTU) {
+      this._sendChunks(blob);
+      return;
+    }
+
+    // DataChannel currently only supports strings.
+    if (!util.supports.sctp) {
+      util.blobToBinaryString(blob, function(str) {
+        self._bufferedSend(str);
+      });
+    } else if (!util.supports.binaryBlob) {
+      // We only do this if we really need to (e.g. blobs are not supported),
+      // because this conversion is costly.
+      util.blobToArrayBuffer(blob, function(ab) {
+        self._bufferedSend(ab);
+      });
+    } else {
+      this._bufferedSend(blob);
+    }
+  } else {
+    this._bufferedSend(data);
+  }
+}
+
+DataConnection.prototype._bufferedSend = function(msg) {
+  if (this._buffering || !this._trySend(msg)) {
+    this._buffer.push(msg);
+    this.bufferSize = this._buffer.length;
+  }
+}
+
+// Returns true if the send succeeds.
+DataConnection.prototype._trySend = function(msg) {
+  try {
+    this._dc.send(msg);
+  } catch (e) {
+    this._buffering = true;
+
+    var self = this;
+    setTimeout(function() {
+      // Try again.
+      self._buffering = false;
+      self._tryBuffer();
+    }, 100);
+    return false;
+  }
+  return true;
+}
+
+// Try to send the first message in the buffer.
+DataConnection.prototype._tryBuffer = function() {
+  if (this._buffer.length === 0) {
+    return;
+  }
+
+  var msg = this._buffer[0];
+
+  if (this._trySend(msg)) {
+    this._buffer.shift();
+    this.bufferSize = this._buffer.length;
+    this._tryBuffer();
+  }
+}
+
+DataConnection.prototype._sendChunks = function(blob) {
+  var blobs = util.chunk(blob);
+  for (var i = 0, ii = blobs.length; i < ii; i += 1) {
+    var blob = blobs[i];
+    this.send(blob, true);
+  }
+}
+
+DataConnection.prototype.handleMessage = function(message) {
+  var payload = message.payload;
+
+  switch (message.type) {
+    case 'ANSWER':
+      this._peerBrowser = payload.browser;
+
+      // Forward to negotiator
+      Negotiator.handleSDP(message.type, this, payload.sdp);
+      break;
+    case 'CANDIDATE':
+      Negotiator.handleCandidate(this, payload.candidate);
+      break;
+    default:
+      util.warn('Unrecognized message type:', message.type, 'from peer:', this.peer);
+      break;
+  }
+}
+/**
+ * Wraps the streaming interface between two Peers.
+ */
+function MediaConnection(peer, provider, options) {
+  if (!(this instanceof MediaConnection)) return new MediaConnection(peer, provider, options);
+  EventEmitter.call(this);
+
+  this.options = util.extend({}, options);
+
+  this.open = false;
+  this.type = 'media';
+  this.peer = peer;
+  this.provider = provider;
+  this.metadata = this.options.metadata;
+  this.localStream = this.options._stream;
+
+  this.id = this.options.connectionId || MediaConnection._idPrefix + util.randomToken();
+  if (this.localStream) {
+    Negotiator.startConnection(
+      this,
+      {_stream: this.localStream, originator: true}
+    );
+  }
+};
+
+util.inherits(MediaConnection, EventEmitter);
+
+MediaConnection._idPrefix = 'mc_';
+
+MediaConnection.prototype.addStream = function(remoteStream) {
+  util.log('Receiving stream', remoteStream);
+
+  this.remoteStream = remoteStream;
+  this.emit('stream', remoteStream); // Should we call this `open`?
+
+};
+
+MediaConnection.prototype.handleMessage = function(message) {
+  var payload = message.payload;
+
+  switch (message.type) {
+    case 'ANSWER':
+      // Forward to negotiator
+      Negotiator.handleSDP(message.type, this, payload.sdp);
+      this.open = true;
+      break;
+    case 'CANDIDATE':
+      Negotiator.handleCandidate(this, payload.candidate);
+      break;
+    default:
+      util.warn('Unrecognized message type:', message.type, 'from peer:', this.peer);
+      break;
+  }
+}
+
+MediaConnection.prototype.answer = function(stream) {
+  if (this.localStream) {
+    util.warn('Local stream already exists on this MediaConnection. Are you answering a call twice?');
+    return;
+  }
+
+  this.options._payload._stream = stream;
+
+  this.localStream = stream;
+  Negotiator.startConnection(
+    this,
+    this.options._payload
+  )
+  // Retrieve lost messages stored because PeerConnection not set up.
+  var messages = this.provider._getMessages(this.id);
+  for (var i = 0, ii = messages.length; i < ii; i += 1) {
+    this.handleMessage(messages[i]);
+  }
+  this.open = true;
+};
+
+/**
+ * Exposed functionality for users.
+ */
+
+/** Allows user to close connection. */
+MediaConnection.prototype.close = function() {
+  if (!this.open) {
+    return;
+  }
+  this.open = false;
+  Negotiator.cleanup(this);
+  this.emit('close')
+};
+/**
+ * Manages all negotiations between Peers.
+ */
+var Negotiator = {
+  pcs: {
+    data: {},
+    media: {}
+  }, // type => {peerId: {pc_id: pc}}.
+  //providers: {}, // provider's id => providers (there may be multiple providers/client.
+  queue: [] // connections that are delayed due to a PC being in use.
+}
+
+Negotiator._idPrefix = 'pc_';
+
+/** Returns a PeerConnection object set up correctly (for data, media). */
+Negotiator.startConnection = function(connection, options) {
+  var pc = Negotiator._getPeerConnection(connection, options);
+
+  if (connection.type === 'media' && options._stream) {
+    // Add the stream.
+    pc.addStream(options._stream);
+  }
+
+  // Set the connection's PC.
+  connection.pc = connection.peerConnection = pc;
+  // What do we need to do now?
+  if (options.originator) {
+    if (connection.type === 'data') {
+      // Create the datachannel.
+      var config = {};
+      // Dropping reliable:false support, since it seems to be crashing
+      // Chrome.
+      /*if (util.supports.sctp && !options.reliable) {
+        // If we have canonical reliable support...
+        config = {maxRetransmits: 0};
+      }*/
+      // Fallback to ensure older browsers don't crash.
+      if (!util.supports.sctp) {
+        config = {reliable: options.reliable};
+      }
+      var dc = pc.createDataChannel(connection.label, config);
+      connection.initialize(dc);
+    }
+
+    if (!util.supports.onnegotiationneeded) {
+      Negotiator._makeOffer(connection);
+    }
+  } else {
+    Negotiator.handleSDP('OFFER', connection, options.sdp);
+  }
+}
+
+Negotiator._getPeerConnection = function(connection, options) {
+  if (!Negotiator.pcs[connection.type]) {
+    util.error(connection.type + ' is not a valid connection type. Maybe you overrode the `type` property somewhere.');
+  }
+
+  if (!Negotiator.pcs[connection.type][connection.peer]) {
+    Negotiator.pcs[connection.type][connection.peer] = {};
+  }
+  var peerConnections = Negotiator.pcs[connection.type][connection.peer];
+
+  var pc;
+  // Not multiplexing while FF and Chrome have not-great support for it.
+  /*if (options.multiplex) {
+    ids = Object.keys(peerConnections);
+    for (var i = 0, ii = ids.length; i < ii; i += 1) {
+      pc = peerConnections[ids[i]];
+      if (pc.signalingState === 'stable') {
+        break; // We can go ahead and use this PC.
+      }
+    }
+  } else */
+  if (options.pc) { // Simplest case: PC id already provided for us.
+    pc = Negotiator.pcs[connection.type][connection.peer][options.pc];
+  }
+
+  if (!pc || pc.signalingState !== 'stable') {
+    pc = Negotiator._startPeerConnection(connection);
+  }
+  return pc;
+}
+
+/*
+Negotiator._addProvider = function(provider) {
+  if ((!provider.id && !provider.disconnected) || !provider.socket.open) {
+    // Wait for provider to obtain an ID.
+    provider.on('open', function(id) {
+      Negotiator._addProvider(provider);
+    });
+  } else {
+    Negotiator.providers[provider.id] = provider;
+  }
+}*/
+
+
+/** Start a PC. */
+Negotiator._startPeerConnection = function(connection) {
+  util.log('Creating RTCPeerConnection.');
+
+  var id = Negotiator._idPrefix + util.randomToken();
+  var optional = {};
+
+  if (connection.type === 'data' && !util.supports.sctp) {
+    optional = {optional: [{RtpDataChannels: true}]};
+  } else if (connection.type === 'media') {
+    // Interop req for chrome.
+    optional = {optional: [{DtlsSrtpKeyAgreement: true}]};
+  }
+
+  var pc = new RTCPeerConnection(connection.provider.options.config, optional);
+  Negotiator.pcs[connection.type][connection.peer][id] = pc;
+
+  Negotiator._setupListeners(connection, pc, id);
+
+  return pc;
+}
+
+/** Set up various WebRTC listeners. */
+Negotiator._setupListeners = function(connection, pc, pc_id) {
+  var peerId = connection.peer;
+  var connectionId = connection.id;
+  var provider = connection.provider;
+
+  // ICE CANDIDATES.
+  util.log('Listening for ICE candidates.');
+  pc.onicecandidate = function(evt) {
+    if (evt.candidate) {
+      util.log('Received ICE candidates for:', connection.peer);
+      provider.socket.send({
+        type: 'CANDIDATE',
+        payload: {
+          candidate: evt.candidate,
+          type: connection.type,
+          connectionId: connection.id
+        },
+        dst: peerId
+      });
+    }
+  };
+
+  pc.oniceconnectionstatechange = function() {
+    switch (pc.iceConnectionState) {
+      case 'disconnected':
+      case 'failed':
+        util.log('iceConnectionState is disconnected, closing connections to ' + peerId);
+        connection.close();
+        break;
+      case 'completed':
+        pc.onicecandidate = util.noop;
+        break;
+    }
+  };
+
+  // Fallback for older Chrome impls.
+  pc.onicechange = pc.oniceconnectionstatechange;
+
+  // ONNEGOTIATIONNEEDED (Chrome)
+  util.log('Listening for `negotiationneeded`');
+  pc.onnegotiationneeded = function() {
+    util.log('`negotiationneeded` triggered');
+    if (pc.signalingState == 'stable') {
+      Negotiator._makeOffer(connection);
+    } else {
+      util.log('onnegotiationneeded triggered when not stable. Is another connection being established?');
+    }
+  };
+
+  // DATACONNECTION.
+  util.log('Listening for data channel');
+  // Fired between offer and answer, so options should already be saved
+  // in the options hash.
+  pc.ondatachannel = function(evt) {
+    util.log('Received data channel');
+    var dc = evt.channel;
+    var connection = provider.getConnection(peerId, connectionId);
+    connection.initialize(dc);
+  };
+
+  // MEDIACONNECTION.
+  util.log('Listening for remote stream');
+  pc.onaddstream = function(evt) {
+    util.log('Received remote stream');
+    var stream = evt.stream;
+    provider.getConnection(peerId, connectionId).addStream(stream);
+  };
+}
+
+Negotiator.cleanup = function(connection) {
+  util.log('Cleaning up PeerConnection to ' + connection.peer);
+
+  var pc = connection.pc;
+
+  if (!!pc && (pc.readyState !== 'closed' || pc.signalingState !== 'closed')) {
+    pc.close();
+    connection.pc = null;
+  }
+}
+
+Negotiator._makeOffer = function(connection) {
+  var pc = connection.pc;
+  pc.createOffer(function(offer) {
+    util.log('Created offer.');
+
+    if (!util.supports.sctp && connection.type === 'data' && connection.reliable) {
+      offer.sdp = Reliable.higherBandwidthSDP(offer.sdp);
+    }
+
+    pc.setLocalDescription(offer, function() {
+      util.log('Set localDescription: offer', 'for:', connection.peer);
+      connection.provider.socket.send({
+        type: 'OFFER',
+        payload: {
+          sdp: offer,
+          type: connection.type,
+          label: connection.label,
+          connectionId: connection.id,
+          reliable: connection.reliable,
+          serialization: connection.serialization,
+          metadata: connection.metadata,
+          browser: util.browser
+        },
+        dst: connection.peer
+      });
+    }, function(err) {
+      connection.provider.emit('error', err);
+      util.log('Failed to setLocalDescription, ', err);
+    });
+  }, function(err) {
+    connection.provider.emit('error', err);
+    util.log('Failed to createOffer, ', err);
+  }, connection.options.constraints);
+}
+
+Negotiator._makeAnswer = function(connection) {
+  var pc = connection.pc;
+
+  pc.createAnswer(function(answer) {
+    util.log('Created answer.');
+
+    if (!util.supports.sctp && connection.type === 'data' && connection.reliable) {
+      answer.sdp = Reliable.higherBandwidthSDP(answer.sdp);
+    }
+
+    pc.setLocalDescription(answer, function() {
+      util.log('Set localDescription: answer', 'for:', connection.peer);
+      connection.provider.socket.send({
+        type: 'ANSWER',
+        payload: {
+          sdp: answer,
+          type: connection.type,
+          connectionId: connection.id,
+          browser: util.browser
+        },
+        dst: connection.peer
+      });
+    }, function(err) {
+      connection.provider.emit('error', err);
+      util.log('Failed to setLocalDescription, ', err);
+    });
+  }, function(err) {
+    connection.provider.emit('error', err);
+    util.log('Failed to create answer, ', err);
+  });
+}
+
+/** Handle an SDP. */
+Negotiator.handleSDP = function(type, connection, sdp) {
+  sdp = new RTCSessionDescription(sdp);
+  var pc = connection.pc;
+
+  util.log('Setting remote description', sdp);
+  pc.setRemoteDescription(sdp, function() {
+    util.log('Set remoteDescription:', type, 'for:', connection.peer);
+
+    if (type === 'OFFER') {
+      Negotiator._makeAnswer(connection);
+    }
+  }, function(err) {
+    connection.provider.emit('error', err);
+    util.log('Failed to setRemoteDescription, ', err);
+  });
+}
+
+/** Handle a candidate. */
+Negotiator.handleCandidate = function(connection, ice) {
+  var candidate = ice.candidate;
+  var sdpMLineIndex = ice.sdpMLineIndex;
+  connection.pc.addIceCandidate(new RTCIceCandidate({
+    sdpMLineIndex: sdpMLineIndex,
+    candidate: candidate
+  }));
+  util.log('Added ICE candidate for:', connection.peer);
+}
+/**
+ * An abstraction on top of WebSockets and XHR streaming to provide fastest
+ * possible connection for peers.
+ */
+function Socket(secure, host, port, path, key) {
+  if (!(this instanceof Socket)) return new Socket(secure, host, port, path, key);
+
+  EventEmitter.call(this);
+
+  // Disconnected manually.
+  this.disconnected = false;
+  this._queue = [];
+
+  var httpProtocol = secure ? 'https://' : 'http://';
+  var wsProtocol = secure ? 'wss://' : 'ws://';
+  this._httpUrl = httpProtocol + host + ':' + port + path + key;
+  this._wsUrl = wsProtocol + host + ':' + port + path + 'peerjs?key=' + key;
+}
+
+util.inherits(Socket, EventEmitter);
+
+
+/** Check in with ID or get one from server. */
+Socket.prototype.start = function(id, token) {
+  this.id = id;
+
+  this._httpUrl += '/' + id + '/' + token;
+  this._wsUrl += '&id='+id+'&token='+token;
+
+  this._startXhrStream();
+  this._startWebSocket();
+}
+
+
+/** Start up websocket communications. */
+Socket.prototype._startWebSocket = function(id) {
+  var self = this;
+
+  if (this._socket) {
+    return;
+  }
+
+  this._socket = new WebSocket(this._wsUrl);
+
+  this._socket.onmessage = function(event) {
+    var data;
+    try {
+      data = JSON.parse(event.data);
+    } catch(e) {
+      util.log('Invalid server message', event.data);
+      return;
+    }
+    self.emit('message', data);
+  };
+
+  // Take care of the queue of connections if necessary and make sure Peer knows
+  // socket is open.
+  this._socket.onopen = function() {
+    if (self._timeout) {
+      clearTimeout(self._timeout);
+      setTimeout(function(){
+        self._http.abort();
+        self._http = null;
+      }, 5000);
+    }
+    self._sendQueuedMessages();
+    util.log('Socket open');
+  };
+}
+
+/** Start XHR streaming. */
+Socket.prototype._startXhrStream = function(n) {
+  try {
+    var self = this;
+    this._http = new XMLHttpRequest();
+    this._http._index = 1;
+    this._http._streamIndex = n || 0;
+    this._http.open('post', this._httpUrl + '/id?i=' + this._http._streamIndex, true);
+    this._http.onreadystatechange = function() {
+      if (this.readyState == 2 && this.old) {
+        this.old.abort();
+        delete this.old;
+      }
+      if (this.readyState > 2 && this.status == 200 && this.responseText) {
+        self._handleStream(this);
+      }
+    };
+    this._http.send(null);
+    this._setHTTPTimeout();
+  } catch(e) {
+    util.log('XMLHttpRequest not available; defaulting to WebSockets');
+  }
+}
+
+
+/** Handles onreadystatechange response as a stream. */
+Socket.prototype._handleStream = function(http) {
+  // 3 and 4 are loading/done state. All others are not relevant.
+  var messages = http.responseText.split('\n');
+
+  // Check to see if anything needs to be processed on buffer.
+  if (http._buffer) {
+    while (http._buffer.length > 0) {
+      var index = http._buffer.shift();
+      var bufferedMessage = messages[index];
+      try {
+        bufferedMessage = JSON.parse(bufferedMessage);
+      } catch(e) {
+        http._buffer.shift(index);
+        break;
+      }
+      this.emit('message', bufferedMessage);
+    }
+  }
+
+  var message = messages[http._index];
+  if (message) {
+    http._index += 1;
+    // Buffering--this message is incomplete and we'll get to it next time.
+    // This checks if the httpResponse ended in a `\n`, in which case the last
+    // element of messages should be the empty string.
+    if (http._index === messages.length) {
+      if (!http._buffer) {
+        http._buffer = [];
+      }
+      http._buffer.push(http._index - 1);
+    } else {
+      try {
+        message = JSON.parse(message);
+      } catch(e) {
+        util.log('Invalid server message', message);
+        return;
+      }
+      this.emit('message', message);
+    }
+  }
+}
+
+Socket.prototype._setHTTPTimeout = function() {
+  var self = this;
+  this._timeout = setTimeout(function() {
+    var old = self._http;
+    if (!self._wsOpen()) {
+      self._startXhrStream(old._streamIndex + 1);
+      self._http.old = old;
+    } else {
+      old.abort();
+    }
+  }, 25000);
+}
+
+/** Is the websocket currently open? */
+Socket.prototype._wsOpen = function() {
+  return this._socket && this._socket.readyState == 1;
+}
+
+/** Send queued messages. */
+Socket.prototype._sendQueuedMessages = function() {
+  for (var i = 0, ii = this._queue.length; i < ii; i += 1) {
+    this.send(this._queue[i]);
+  }
+}
+
+/** Exposed send for DC & Peer. */
+Socket.prototype.send = function(data) {
+  if (this.disconnected) {
+    return;
+  }
+
+  // If we didn't get an ID yet, we can't yet send anything so we should queue
+  // up these messages.
+  if (!this.id) {
+    this._queue.push(data);
+    return;
+  }
+
+  if (!data.type) {
+    this.emit('error', 'Invalid message');
+    return;
+  }
+
+  var message = JSON.stringify(data);
+  if (this._wsOpen()) {
+    this._socket.send(message);
+  } else {
+    var http = new XMLHttpRequest();
+    var url = this._httpUrl + '/' + data.type.toLowerCase();
+    http.open('post', url, true);
+    http.setRequestHeader('Content-Type', 'application/json');
+    http.send(message);
+  }
+}
+
+Socket.prototype.close = function() {
+  if (!this.disconnected && this._wsOpen()) {
+    this._socket.close();
+    this.disconnected = true;
+  }
+}
+
+})(this);